If you subscribe to C.P.L as a mailing list instead of a newsgroup, I believe most of the spam gets filtered out at the mailing list<->news group gateway by the Python.org spam filters... At least no spam in my Gmail spam folder appears to be flagged from this group(at a very brief glance) so they appear to be doing quite well.
Allow me to take this opportunity to thank the folks that *are* doing/managing this spam-filtering of the mailing list side of things -- the drastic drop in spam (from 6+ months back) is much appreciated!
Though I guess this thread does beg the question: is there a way to read the filtered mailing list with a newsreader (via NNTP) instead of getting it delivered via email or subjecting oneself to the spamminess of c.l.p? I like some of the "kill-thread" types of options I've got on the NNTP side of readers that aren't as readily available to me on the email side of things (Thunderbird allows for thread-kills in News, but not in email).
-tkc -- http://mail.python.org/mailman/listinfo/python-list